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⚖️ '''Wind versus water dispute''' describes the recurring legal and [[Definition:Claims adjustment | claims-handling]] conflict in [[Definition:Property insurance | property insurance]] over whether storm damage to a structure was caused by wind — typically a covered peril under a [[Definition:Homeowners insurance | homeowners]] or [[Definition:Commercial property insurance | commercial property]] policy — or by flood and [[Definition:Storm surge | storm surge]], which are generally excluded from standard policies and covered separately through the [[Definition:National Flood Insurance Program (NFIP) | National Flood Insurance Program]] or private [[Definition:Flood insurance | flood]] carriers. The dispute is most acute in coastal regions struck by hurricanes, where wind and water act simultaneously on the same property, making precise attribution of individual damage elements extraordinarily difficult. Hurricane Katrina in 2005 produced thousands of such disputes along the Gulf Coast and became the defining case study for the issue.

🔍 At the heart of these disputes is the [[Definition:Concurrent causation | concurrent causation]] problem: when two perils — one covered, one excluded — combine to produce a single, indivisible loss, which policy responds? Insurers typically rely on [[Definition:Anti-concurrent causation clause | anti-concurrent causation (ACC)]] clauses that deny coverage for any loss in which an excluded peril contributes, regardless of whether a covered peril also played a role. Policyholders and their attorneys counter that the wind damage occurred independently and should be compensable on its own. [[Definition:Claims adjuster | Adjusters]] and [[Definition:Forensic engineering | forensic engineers]] examine physical evidence — roof uplift patterns, waterline marks, debris trajectories — to parse the loss, but complete separation is often impossible. Courts across different states have reached conflicting conclusions on the enforceability of ACC clauses, creating a patchwork of legal standards.

🏛️ These disputes have shaped [[Definition:Insurance regulation | regulatory]] policy and [[Definition:Policy form | policy language]] in lasting ways. Several states responded to Katrina-era litigation by requiring insurers to offer optional [[Definition:Storm surge | storm surge]] or water damage endorsements, and regulators have pushed for clearer [[Definition:Disclosure requirement | disclosure]] about what standard policies exclude. For [[Definition:Insurance carrier | carriers]], the wind-versus-water issue drives [[Definition:Reinsurance | reinsurance]] structuring decisions because the allocation between wind and flood layers directly affects recovery under [[Definition:Excess of loss reinsurance | excess-of-loss treaties]]. The dispute remains a live issue with each major hurricane landfall, ensuring that [[Definition:Underwriting | underwriters]], defense counsel, and [[Definition:Catastrophe model | catastrophe modelers]] continue to refine their approaches to concurrent-peril losses.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Concurrent causation]]
* [[Definition:Anti-concurrent causation clause]]
* [[Definition:Wind damage]]
* [[Definition:Flood insurance]]
* [[Definition:Storm surge]]
* [[Definition:National Flood Insurance Program (NFIP)]]
{{Div col end}}

Definition:Wind versus water dispute - Revision history

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